View Full Version : What causes a long-start?

November 27th, 2017, 16:31
This is on my friends XJ:

'00 with reman 0630 head (still using the original distributor-less ignition)
New fuel pump
New injectors
New plugs
New wires
New waterpump/thermostat/hoses
New radiator
New O2 sensors (cat still intact)

Keying on/off a couple times prior to starting doesn't affect it. Still has a long start (indicating to me that its NOT a fuel pressure issue).

Hot/cold doesn't really change much. Always takes the same time to crank over... 5-10sec.

What else can cause a long start condition like this? I don't really want to get him to just start throwing money at sensors... but I'm not sure where to start.

November 27th, 2017, 16:55
Besides the fact that a 2k doesn't have spark plug wires....................
Until you put up some fuel pressure numbers????????????

November 27th, 2017, 17:45
Haha oops. My bad. Was just looking at my receipts trying to make sure I didn't miss anything important... but the wires were for my XJ (98). You're correct, his has no wires.

I can try to get some numbers but his Jeep is 50km away from me right now... sooo... what else should I look for next time I'm out there getting these pressure numbers?

November 27th, 2017, 21:30
Also forgot to mention:
new timing chain and gears
new oil pump
0331-0630 exhaust adapter plate
new head studs

His XJ had the long start issue before the head swap and again afterwards

November 28th, 2017, 06:00
when its cranking is the rpm gauge jumping up a little bit? might be that the ecu is having trouble seeing the engine actually turning.

any check engine lights?

November 29th, 2017, 17:31
Try letting off the key after about 5 secs then try to start again after about a second. Any difference?

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